PHP Warning 'yii\base\ErrorException' with message 'file_get_contents(C:\inetpub\SkElibApi\components\viewer\assets\): failed to open stream: No such file or directory' 

in C:\inetpub\SkElibApi\controllers\ApifileController.php:659

Stack trace:
#0 [internal function]: yii\base\ErrorHandler->handleError(2, 'file_get_conten...', 'C:\\inetpub\\SkEl...', 659, Array)
#1 C:\inetpub\SkElibApi\controllers\ApifileController.php(659): file_get_contents('C:\\inetpub\\SkEl...')
#2 [internal function]: app\controllers\ApifileController->actionGet('preview', '', '6222059', '', '')
#3 C:\inetpub\SkElibApi\vendor\yiisoft\yii2\base\InlineAction.php(57): call_user_func_array(Array, Array)
#4 C:\inetpub\SkElibApi\vendor\yiisoft\yii2\base\Controller.php(156): yii\base\InlineAction->runWithParams(Array)
#5 C:\inetpub\SkElibApi\vendor\yiisoft\yii2\base\Module.php(523): yii\base\Controller->runAction('get', Array)
#6 C:\inetpub\SkElibApi\vendor\yiisoft\yii2\web\Application.php(102): yii\base\Module->runAction('apifile/get', Array)
#7 C:\inetpub\SkElibApi\vendor\yiisoft\yii2\base\Application.php(380): yii\web\Application->handleRequest(Object(yii\web\Request))
#8 C:\inetpub\SkElibApi\web\index.php(15): yii\base\Application->run()
#9 {main}